20201102002221 has 16 divisors (see below), whose sum is σ = 30893760265344. Its totient is φ = 11501813617344.

The previous prime is 20201102002199. The next prime is 20201102002231. The reversal of 20201102002221 is 12220020110202.

It is not a de Polignac number, because 20201102002221 - 2⁶ = 20201102002157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20201102002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201102002231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1736379090 + ... + 1736390723.

It is an arithmetic number, because the mean of its divisors is an integer number (1930860016584).

Almost surely, 2^{20201102002221} is an apocalyptic number.

20201102002221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20201102002221 is a deficient number, since it is larger than the sum of its proper divisors (10692658263123).

20201102002221 is a wasteful number, since it uses less digits than its factorization.

20201102002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472770100.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20201102002221 its reverse (12220020110202), we get a palindrome (32421122112423).

The spelling of 20201102002221 in words is "twenty trillion, two hundred one billion, one hundred two million, two thousand, two hundred twenty-one".